Nut-lock.



UNITED STATES PATENT v(Drittes.

SICIIN w. ELETCI'IEE, or CIIICACC, ILLINOIS, ssIGNoR o'E oNE-'IIALF ToNAETALY NEWMAN, or CHICAGO, ILLINOIS.

Nui'LLoCk.

SPECIFICATION forming part pf Letters rai-t N. csgees, dated olea-bei22', 190i. iptii'atlon nea sepamta 25. 1to0.' serai No. 31net. (Notitan.)

To all whom it may cortar/Pm Be it known that l, JOHN W. FLETCHER, aCitizen of the United States, and a resident of Chicago, in the countyof Cook and State of Illinois, have invented certain new and usefulImprovementsin Nut-Locks; and I hereby declare that the following is afull, clear, and exact description thereof, reference being had to theaccompanying drawings, and to the letters of reference markedthereomwhich form a part of this specification.

This invention relates to improvements in nut-locks,and contemplatesmeans for fastening the nut on a bolt without the use of springs.

The invention consists in the matters hereinafter described, and morefully pointed out and deined in the appended claims.

In the drawings, Figure 1 is an end elevation of a bolt provided withmyimproved nutlock, illustrating a lock to the lock. Fig. 2 is a sideelevation'of the same, partly in section.

As shown in said drawings, A indicates a threaded bolt of any desiredkind. Said screw-threaded end of the bolt is split diametrically andlongitudinally and a threaded tapering axial vaperture is providedtherein.

B indicates the nut provided with internal screw-threads` complementalto the screwthreads in the bolt A.

(l indicates a tapering stud-bolt provided with screw-threadscomplemental to the screwthreads in the tapered aperture in the end ofthe bolt and provided at its outer end with an angular head. Thediameter of the screwthreaded part ofthe said stud-bolt C is slightlygreater than the aperture in the end of the bolt A, so that when saidstud-bolt is screwed therein it acts as a Wedge and spreads or dilatesthe end of the bolt A to a slightly oval form, with the effect ofjamming or wedging the nut B in' position on the bolt. Preferably if thebolt A is provided with a right-hand thread the bolt C will be providedwith a lefthand thread, so that any cause which would act to unscrew thenut B from the bolt A would serve to proportionately tighten saidstud-bolt in its seat, thereby more effectually wedging the nut B inposition.

D indicates ay lockifngig-plate` provided centrally with an angularaperture adapted to receive the head of the stud-boltC'. The plate D isextended on one Aside and provided with an aperture to receive a bolt E,which is passed through the aperture in the plate when the same is inposition on the head of the stud-bolt and has screw-threaded engag'-ment in an aperture in the nut B, as indicated in Fig. 2. Obviously, ifpreferred, said plate D may be made integral with said bolt G.

Obviously details of construction may be varied without departing from.the principle of my invention. I claim as my inventionl. The combinationwith a bolt having itsy on and a part rigidly secured on the stud-bolt land adapted to be rigidly secured to said nut.

2. The combination with a screw-threaded bolt having the screw-threadedend thereof slit diametrically and provided axially with a taperingscrew-threaded socket, a stud-bolt colnplemental to the tapering socketin the end of the bolt and-0f slightly greater diameter and providedwith a head adapted for engagement by a Wren ch or the like and a plateadapted to be secured on said head and pro- Y vided on one side with anaperture and a locking-pin adapted to be passed through said ap.

erture in the plate and to 'engage in an aperture in the nut. i

3. The combination with a screw-threaded bolt having the screw-threadedend thereof slit diametricall'y and provided axially with 'a taperingsocket, internal screw-threads in said socket having a lead oppositefrom-the' p,

lead of the screwthreads on the bolt, a nut on said bolt, a stud-boltcomplemental to the tapering socket in the end of the bolt and ofslightly greater diameter and provided with VIo@ a head adapted forengagement Withawreneh In testimony whereof I have hereunto suhor thelike, a plate secured on said head and scribed my name in the presenceof two subhaving an aperture in one of its margins, and seribingWitnesses.

a sorew-threaded locking-bolt adapted to be JOHN W. FLETCHER. 5 passedthrough said aperture and to have 'Vitnesses:

screw-thrended engagement with an aperture NAFTALY NEWMAN,

in said mit. C. WUHILLS.

